Portable collapsible stand



Jan. 23, 1968 L. s. HILL PORTABLE COLLAPSIBLE STAND Filed Oct. l, 1965FIG 3 FIG 5 INVENTOR j LOWELL HILL ATTY United States Patent O 3,365,072PRTABLE COLLAPSIBLE STAND Lowell S. Hill, 800 Judson Ave., Evanston,Ill. 60202 Filed Oct. 1, 1965, Ser. No. 492,234

7 Claims. (Cl. 211-149) The improved portable collapsible standcomprising the present invention has been designed for use primarily asa personalized and readily set up on floor or table lectern facility forsupporting lecture notes and material by lecturers, clergymen, salesmenand other speakers, including papers, writing materials and small modelsin an orderly fashion for reference purposes when required. The standcan -be used also as a table for writing when lmaking notes or as a clipboard to secured articles thereon against loss when the stand is usedoutdoors. The invention is capablel of other uses and, if desired, withor without rearrangement as capable of other uses and, if desired, withor without rearrangement as required, may be employed as a displaystand, an easel, a rack, or hanger along with other uses too numerous tomention. lrrespective, however, of any particular use to which theinvention may be put, the structural features thereof are at all timespreserved.

Due to the versatility of the present portable, collapsible stand, theobjects of the invention are manifold and principal among them are theprovisions of a light stand which is readily erected and dismantled,quite stable in use even when subjected to heavy loads, and is easilymoved or shifted from place to place during a lecture merely by grippingthe top. These objects are attained by the provision of a two-pieceseparable frame structure having two foldable frame sections which canbe used each as a separate unit, or one upon the other as a compositeunit of upper and lower sections. The two sections, when assembled uponeach other lend rigidly interrelated support, each for the other, sothat collapsing of the stand under expected use is impossible. The twosections are, individually foldable for carrying or storage in a narrowspace and the upper section is foldable in only one direction so thatwhen it is in its extended condition the lower section may be dispensedwith and the upper section supported upon a table top, for example,Where it may serve as a table lectern, the effective height of which,when added to the height of the table, is appropriate for closevisibility of lecture material by a standing lecturer.

A further object of the present invention resides in the provision of alectern or stand in which the effective height of a top panel member orplatform associated therewith may readily be adjusted withoutnecessitating adjustment of the composite sections, this being the casev whether both frame sections or only one frame section is in use. Asimilar and related object is to provide a stand in which the top panelmember, in any adjusted position thereof, in etiect constitutes amechanical rigidifying element of the composite unit and in combinationwith the adjacent frame links, defines a triangular relationship whichsecures the upper and lower sections with a frictional interlock that iseasily established and released.

Still another object of the invention is to provide a portable foldablestand of the character described having a. novel arrangement of anadjustable open front compartment where articles are readily accessibleto the lecturer below the lectern platform.

The invention provides a. portable stand or lectem arrangement which canbe made of commercially available tube stock, sometimes referred to asthin wall, and veneer or pressed board stock, whereby the article m-aybe manufactured at a low cost; one which contemplates a minimum numberof moving parts and is unlikely to get out ice of order; one which isreadily understandable by those unskilled mechanically, for easyerection and dismantling; one which is of feather weight construction;one which may be folded into a flat thin package for purposes ofshipment or storage and which consumes but little space so that it mayconveniently be transported by carrying it substantial distances by onehand if need be; one which is attractive in its appearance and pleasingin its design; and, one which is well adapted to perform the -servicesrequired of it.

Other objects and advantages of the invention, not at this timeenumerated, will readily suggest themselves as the following descriptionensues:

In the accompanying single sheet of drawings forming a part of thisspecification, one illustrative embodiment of the invention has beenshown.

In these drawings:

FIG. 1 is a perspective view of a portable collapsible stand or lecternconstructed according to the present invention and showing the same inits erected condition;

FIG. 2 is a partially exploded side elevational view of the stand, theenclosing curtain or apron associated therewith being removed in theinterests of clarity;

FIG. 3 is a rear elevational View of the stand;

FIG. 4 is a side elevational view of the upper frame section, showingthe same in use as a table-supported lectern;

FIG. 5 is an enlarged sectional view taken substantially on the line 5 5of FIG. 2;

FIG. 6 is an enlarged sectional view taken substantially on the line 6-6of FIG. 3; and

FIG. 7 is a perspective view of a stop bracket employed in connectionwith the present invention.

Referring now to the drawings in detail and in particular to FIGS. 1 and2, a collapsible portable stand constructed according to the presentinvention has been shown in its composite erected condition anddesignated in its entirety at 10. Brietly, the stand 10 involves in itsgeneral organization a two-part sectional supporting framework comprisedof an upper articulated section 12, and a lower articulated section 14.The two sections 12 and 14 are similar in their construction and eachinvolves a pair of U-shaped frame members formed from lengths of tubestock.

The upper frame section 12 includes an outside U- shaped frame member 20having parallel frame legs 22 and an interconnecting bight portion 24(see also FIG. 4). It further includes an inner U-shaped frame member 26having parallel frame legs 28 and an interconnecting bight portion 30.The frame legs 22 and 28 of the two sections are pivotally connectedtogether medially of their ends by rivet-like pivot pins 32. Sheet metalstop brackets 34 (FIG. 7) are interposed between the adjacent legs 22and 28 at their regions of crossing. The stop brackets are v generallyof S-shape in cross section and include diagonally disposed cradleportions 36 which receive the legs 22 and 28 sidewise and limit thespreading movements of the frame members 20 and 26 to the approximateangle of which is shown in FIGS.v 2 and 4. The pivot pins 32 passthrough Central openings 38 provided in the stop brackets 34.

The lower ends of the legs 22 and 28 are turned downwardly as at 40 (seeparticularly FIG. 4) to provide a series of four foot portions with theextreme lower ends of these foot portions 40 reduced as at 42 (FIG. 5)for a substantial portion of their terminal length. Elastomer foot plugs44 are received telescopically in the foot portions 40 and are crimpedin position as indicated at 46. As will be more fully describedpresently, the upper frame section 12 constitutes a support for aninclined lectern platform 50 and it is capable of'constituting the solesupport for such platform, in which case it may be itself supported froma suitable elevated supporting structure such as the table top shown inFIG. 4 and designated at 52, as well as used in conjunction with thearticulated lower frame section 14 as shown in FIG. 2 to maintain thelectern platform S at a proper elevation for use by a person in astanding position.

The lower frame section 14 includes an outside frame member 54 havingparallel legs S6 and an interconnecting bight portion 58. The framesection 14 further includes an inside frame member 60 having parallellegs 62 and an interconnecting bight portion 64. The two frame membersS4 and 60 are pivotally connected together in the manner previouslydescribed with respect to the pivotal connection between the framemembers 20 and 26 of the upper frame section 12. In order to avoidneedless repetition of description it is noted that the pivotalconnection for the frame members 54 and 60 has been designated in itsentirety at 68, and it includes a similar pair of stop brackets Thelower frame section 14 is designed as a base support for the upper framesection 12 when the stand or lectern platform 50 is supported from aHoor or ground surface rather than from an elevated table surface.Accordingly, the two sections 12 and 14 are capable of being arranged invertical tandem relationship with the bight portions 58 and 64 beingeffectively supported on the floor or ground surface through the `mediaof respective pairs of elastomer sleeves 70 (FIGS. l, 2 and 3) whichprevent sliding or skidding of the lectern as a whole and which surroundthe bight portions 58 and 64. The upper or distal ends of the legs 52and 56 are turned upwardly as at 72 for alignment with the downturnedpor tions 40 (see also FIG. 5) and the open circular rims of theseupturned portions telescopically receive therein the reduced extensions42, together with their contained elastomer foot plugs 44.

The thus assembled framework of the stand is of a rigid nature, theinsertion of the extensions 42 into the upper ends of the upturnedportions 72 of the legs 56 and 62 serving to prevent collapse of the twoarticulated sections 12 and 14. The stop brackets 34 further serve torigidify the structure. It is to be noted at this point that the extentof the legs 56 and 62 of the lower section 14 is uniform so that theupper ends of these legs terminate in the same horizontal plane. On theother hand, the extent of the legs 28 is somewhat less than the extentof the legs 22 of the upper section 12 so that the bight portion 30 liesin a horizontal plane below the horizontal plane of the bight portion24. The general plane of the lectern platform 50 is thus substantiallyan inclined plane as supported on the two bight portions 24 and 30.

As best seen in FIGS. 1, 2 and 4, the lectern platform 50 is in the formof a generally rectangular panel of a suitable sheet material such aspressed wood, plywood, iiberboard or the like. If desired, it may bemade of a lightweight metal, such as aluminum. The lower longitudinaledge region of the panel is turned upwardly to provide a retainingflange 80 for preventing sliding or rolling of small articles from theplatform. The underneath surface of the platform has suitably securedthereto a series of four pairs of resilient retaining snap clips 82(FIGS. 1 and 6), each clip being in the form of a length of a narrowstrip of spring vmaterial providing an arcuate cradle portion 84,suspension legs 86, and lateral anchoring flanges S8 which are securedto the platform S0 by rivets 90, or the like. The clips of each pair arelongitudinally aligned and the distance between clips which are onceremoved from one another in the transverse direction of the platform arespaced apart a distance preferably a little greater than thecenter-to-center distance between the two parallel bight portions 24 and30. The clips 82 are designed for selective application to these bightportions 24 and 30 by the simple expedient of pressing them downwardlyso that the cradle portions 84, which are in the form of major circlesectors, will snap into position on the bight portions. Since in theexemplary form of lectern platform S0 there are four such pairs ofattachment clips 82, two positions of the lectern platform in thelectern assembly are possible. When the first and third pair of clips 82(as viewed from left to right in FIGS. 2 and 4) are clipped onto thebight portions 24 and 3ft, the lectern platform 50 will assume a raisedinclined position wherein the lectern as a whole is at its maximumheight. When the second and fourth clips 82 are attached to the bightportions 24 and 30, the platform 50 will assume a lesser height. Ineither position of the platform 50, the inclination thereof will remainthe same.

In both instances, however, the wider spacing of the clips spread thebight portions more widely than would be their spacing under restingconditions with the reductions 42 of the upper section disposed in theupper ends 72 of the lower section 14. This wider spacing of the bightportions 30 and 24 induced by the space of the clips when attached tendsto cock the telescoping elements 42 and 72 with respect to each otherand places a frictional strain thereon which interlocks themsufficiently for them to be lifted as a unit by gripping the uppersection 12, or the platform S0, thus effectively unitizing the assemblyof portions for handling as though it were integrally formed.

The lectern of the present invention is provided with a removablecompartment-forming panel structure 85 which, when in position on theframework of the lectern, also establishes a shelf immediately beneaththe platform Si). The panel structure may be formed of a suitablepressed board material and in its iiat condition it is in the form of arectangular sheet having a crease or hinge line 87 extendingthereacross. The hinge line 87 divides the panel structure into a shelfsection 89 and a rear wall section 91. A hook-like suspension bracket 92is secured to the rear wall section 91 and is adapted to be hooked overthe bight portion 24 of the frame section 12. The forward edge region ofthe shelf section 89 is adapted to 4be loosely supported on a transversestrut member 94 (FIGS. 1 and 2) which extends between the legs 22 of theframe member 12, the strut member being provided with U-shapedattachment clips 96 at its opposite ends by means of which theattachment may be effected at any desired elevation. When the strutmember is in position, the suspension bracket 92 may be hooked over thebight portion 24 and the forward edge region of the shelf section 89caused to rest upon the strut member 94, whereupon the rear wall section91 will extend substantially vertically while the shelf section 89 willassume a slightly inclined position, depending upon the particularelevation of the strut member 94. The strut member may be so positionedthat the inclination of the shelf section 89 will be the same as theinclination of the lectern platform S0. Since the panel structure 85 isassociated only with the upper frame member 12 and has no connection tothe lower frame member 14 whatsoever, it is useable with the lecternwhen the upper frame member is supported on a table top as shown in FIG.4 or when it is supported from the floor or ground as shown in FIGS. land 2. Obviously, the stand or lectern 10 is capable of use either withor without the application thereto of the panel structure S5 and whenthe latter is not required, it may conveniently be folded and stored inan out-of-the-way position.

As shown in FIG. l, a further auxiliary adjunct to the stand or lectern10 in the form of a back and side drape 98 may be provided if desired.This drape is in the form of a rectangular shee-t of a suitable fabric,such as velvet, when the lectern is to be employed as a pulpit lectern.Various drapery fabrics are suitable for forming the drape 98. The drape98 may be secured to the framework in any suitable manner as for exampleby the use of conventional drapery pin hooks which may be applied to thebight portion 24 of the upper section 12 and by the use of single pinhooks at the upper corner regions of the sheet material which may beattached to the bight portion Sti. The drape 98 may extend from theplatform 50 downwardly to the extreme lower regions of the frameworkwhere its lower edge is substantially coincident with the oor or othersupporting surface.

The collapsed condition of the lectern has not been illustrated hereinbut it is believed that it is obvious that when the platform Sil isremoved to release the interlocking strain at the telescoping elements42 and 72, the upper frame section 12 is then separated from the lowerframe section 14, both of these sections are then capable of beingindividually collapsed by the simple expedient of swinging therespective U-shaped frame members about their pivotal axes so as to'bring the same into substantial coincidence with the inner framemembers being `disposed substantially within the contines of theirassociated frame members. The panel structure 85, together with the twocollapsed frame sections, as well as the strut 94 may then be nestedwithin a relatively small space for purposes of storage.

The invention is not to be limited to the exact arrangement of partsshown in the accompanying drawings or described in this specification asvarious changes in the details of construction may be resorted towithout departing from the spirit of the invention. Therefore, onlyinsofar as the invention has particularly been pointed out in theaccompanying claims, is the Same to be limited.

What is claimed is:

1. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including upper and lower framesections comprised of tubular stock, each section being comprised ofsimilar U-shape frame members having parallel side legs and aninterconnecting bight portion, the distance between the side legs of oneframe member being slightly less than the distance between the side legsof the other frame member whereby the frame mem-bers may iit together innested relationship, pivot pins connecting the adjacent side legs in themedial regions thereof lwhereby the pivoted members may be swungrelative to each other between a substantially collapsed position and awide-angle extended position, the distal end regions of all of said Sidelegs being turned laterally out of the planes of the respective sidemembers and extending vertically and in parallelism when the sectionsare in their extended positions, said distal end regions of all of theside legs of one of said frame sections being provided with reducedextensions which are removably and telescopically received within thedistal end regions of the side legs of the other frame section wherebythe upper frame section is supported from and overlies the lower framesection, the effective length of all of the side legs of the lower framesection being equal and the length of the side legs of one frame memberof the upper frame section `being greater than the length of the sidelegs of the other frame member of said latter frame section whereby thebight portions of the upper frame section assume different heights, anda lectern platform removably secured to said bight portions of the twoframe members, bridging the distance therebetween, and overhanging atleast one of said bight portions.

2. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including upper and lower framesections comprised of tubular stock, each section being comprised ofsimilar U-shape frame members having parallel side legs and aninterconnecting bight portion, the distance between the side legs of oneframe member being slightly less than the distance between the side legsof the other frame member whereby the frame members may t together innested relationship, pivot pins connecting the adjacent side legs in themedial regions thereof whereby the pivoted members may be swung relativeto each other between a substantially collapsed position and awide-angle extended position, limit stop means for restraining the framemembers of one of said frame sections in said wide-angle extendedposition, the distal end regions of all of said side legs 'being turn-edlaterally out of the planes of the respective side members and extendingin parallelism when the sections are in their extended positions, saiddistal end regions of all of the side legs of one of said frame sectionsbeing provided with reduced extensions which are removably andtelescopically received within the distal end regions of the side legsof the other frame section in said wide angle extended position wherebythe upper frame section is supported from and overlies the lower framesection, the effective length of all of the side legs of the lower framesection being equal and the length of the side legs of one frame memberof the upper frame section being greater than the length of the sidelegs of the other frame member of said latter frame section whereby thebight portions of the upper frame section `assume diffe-rent heights,and are spaced a predetermined distance by said limit stop means, alectern platform removably secured to said bight portions of the twoframe members, bridging the distance therebetween, and engaging them ata distance different from said predetermined distance to cock thetelescoping distal end regions and impose an interlocking fri-ctionalstrain therebetween.

3. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including a pair of similar U-shapedframe members each having a pair of substantially parallel side legs andan interconnecting bight portion, the distance between the side legs ofone frame member being slightly less than the distance between the sidelegs of the other frame member whereby the side legs of one frame membermay fit partially crosswise and interiorly of the other frame member,pivot pins connecting the adjacent side legs of the two frame members inthe medial regions thereof whereby the thus pivoted members may be swungrelative to each other between a substantially collapsed position withthe bight portions together and a wide angle resting position whereinthe bight portions are spaced a predetermined distance and the frameworkis in stable equilibrium when the distal ends of the side legs rest upona supporting surface, the effective length of the side legs of one ofsaid frame members being appreciably greater than the effective lengthof the side legs of the other frame member whereby the bight portions ofthe frame members assume different heights, stop means for supportingsaid frame members in their wide-angle resting position in weightbearing relation, a lectern platform, and means carried by said lecternplatform removably securing the lectern platform to both of said bightportions of the two frame members to bridge the distance therebetweenand overhang each of .said bight portions and forcing them from theirpredetermined spacing under strain upon the frame members to a workingposition of different spacing to rigidity the portable stand as a unit.

4. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including a pair of similar U-shapedframe members each having a pair of substantially parallel side legs andan interconnecting bight portion, the distance between the side legs ofone frame member being slightly less than the distance between the sidelegs of the other frame member whereby the side legs of one frame membermay tit partially crosswise and interiorly of the other fra-me member,pivot pins connecting the adjacent side legs of the two frame members inthe medial regions thereof whereby the thus pivoted members may be swungrelative toV each other between a substantially collapsed position withthe bight portions together and a wide-angle position wherein the bightportions are spaced a predetermined distance and the framework is instable equilibrium when the distal ends of the side legs rest upon asupporting surface, the effective length of the side legs of one of saidframe members being appreciably greater than the effective length of theside legs of the other frame member whereby the bight portions of theframe members assume different heights, limit stop means for supportingsaid frame members in their wide-angle position in weight bearingrelationship, a lectern platform bridging the distance between the twobight portions and overhanging each of said bight portions, and meanscarried by said lectern platform securing the lectern platform to bothbight portions and holding said bight portions a different spaceddistance from that determined by said limit stop means to strain theframe members and rigidity the assembly as a unit for manipulation byhandling the platform.

5. A collapsible portable stand as set forth in claim 4, wherein saidsecuring means comprises two pairs of trans- Versely aligned retainingclips mounted on the underneath side of said lectern platform which areselectively engageable with said bight portions of the frame members,said clips in cooperating pairs being spaced differently than the bightportions in their said relative positions and constituting also themeans for removably securing the platform to the frame members inselected positions of vertical adjustment.

6. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including a pair of similar U-shapedframe members each having a pair of substantially parallel side legs andan inter connecting bight portion, the distance between the side legs ofone frame member being slightly less than the distance between the sidelegs of the -other frame member whereby the side legs of one framemember may t partially crosswise and interiorly of the other framemember; pivot -pins connecting the adjacent side legs of the two framemembers in the medial regions thereof whereby the thus pivoted membersmay be swung relative to each other between a substantially collapsedposition with the bight portions together and a wide-angle positionwherein the bight portions are spaced a predetermined distance and theframework is in stable equilibrium when the distal ends of the side legsrest upon a supporting surface, the effective length of the side legs ofone of said frame members being appreciably greater than the effectivelength of the side legs of the other frame member whereby the bightportions of the frame members assume different heights; limit stop meansmaintaining said frame members in said wide-angle position comprising asecond framework detachably connected to the iirst mentioned frameworkand having pairs of opstanding members in interconnecting relationshipwith the lower ends of said frame members of the first framework in saidwide-angle 4positions in weight supported relationship, and meansengaging one of said frameworks to hold the pairs of members of one ofsaid frameworks in said wide-angle position in weight supportingrelationship; a lectern -platform removably bridging the distancebetween the bight portions of the first two frame members andoverhanging each of said bight portions; and means removably securingthe lectern platform to said bight portions of the lirst two framemembers at a spaced distance different from that of said relativepositions determined by said limit stop means, said lectern platform,securing means and upstanding members interacting to strain said membersfrom said wide-angle position to frictionally strain and rigidity saidinterconnecting relationship and unitize the assembly for manipulationby handling the platform.

7. A collapsible portable stand designed for use as a lectern or thelike and comprising: a framework including a pair of similar U-shapedframe members each having a pair of substantially parallel side legs andan inter- `connecting bight portion, the distance between the side legsof one frame member being slightly less than the distance between theside legs of the other frame member whereby the side legs of one framemember may t partially crosswise and interiorly of the other framemember, pivot pins connecting the adjacent .side legs of the two framemembers in the medial regions thereof whereby the thus pivoted membersmay be swung relative to each other between a substantially collapsedposition and a wide-angle position wherein the frame work is in stableequilibrium when the distal ends of the side legs rest upon a supportingsurface, the effective length of the side legs of one of said framemembers being appreciably greater than the effective length of the sidelegs of the other frame member whereby the bight portions of the framemembers assume different heights, a lectern platform removably securedto said bight portions of the two frame members, bridging the distancetherebetween and overhanging each of said bight portions, a rigid stmtmember extending between the side legs of one of said frame members,below the level of said pivot pins, and a sectional panel including ashelf section and a back wall panel hingedly connected together alongmating edges, the distal end or' said back wall panel being removablysecured to one of said bight portions and the distal end region of saidshelf panel being removably supported on said rigid strut member.

References Cited UNITED STATES PATENTS 2,458,621 1/1949 Miller 248-188-9X 2,837,391 6/1958 Clark 108-119 X 2,957,736 10/1960 Olander et al10S-119 X 3,080,202 3/1963 Franzene 10S-119 X 3,134,192 5/ 1964 Huifer10S-119 X FOREIGN PATENTS 1,197,165 6/1959 France.

ROY D. FRAZIER, Primary Examiner.

CHANCELLOR E. HARRIS, Examiner.

W. D. LOULAN, Assistant Examiner.

1. A COLLAPSIBLE PORTABLE STAND DESIGNED FOR USE AS A LECTERN OR THELIKE AND COMPRISING: A FRAMEWORK INCLUDING UPPER AND LOWER FRAMESECTIONS COMPRISED OF TUBULAR STOCK, EACH SECTION BEING COMPRISED OFSIMILAR U-SHAPED FRAME MEMBERS HAVING A PARALLEL SIDE LEGS AND ANINTERCONNECTING BIGHT PORTION, THE DISTANCE BETWEEN THE SIDE LEGS OF THEFRAME MEMBER BEING SLIGHTLY LESS THAN THE DISTANCE BETWEEN THE SIDE LEGSOF THE OTHER FRAME MEMBER WHEREBY THE FRAME MEMBERS MAY FIT TOGETHER INNESTED RELATIONSHIP, PIVOT PINS CONNECTING THE ADJACENT SIDE LEGS IN THEMEDIAL REGIONS THEREOF WHEREBY THE PIVOTED MEMBERS MAY BE SWUNG RELATIVETO EACH OTHER BETWEEN A SUBSTANTIALLY COLLAPSED POSITION AND WIDE-ANGLEEXTENDED POSITION, THE DISTAL END REGIONS OF ALL OF SAID SIDE LEGS BEINGTURNED LATERALLY OUT OF THE PLANES OF THE RESPECTIVE SIDE MEMBERS ANDEXTENDING VERTICALLY AND IN PARALLELION WHEN THE SECTIONS ARE IN THEIREXTENDED POSITIONS, SAID DISTAL END REGIONS OF ALL OF THE SIDES LEGS OFONE OF SAID FRAME SECTIONS BEING PROVIDED WITH REDUCED EXTENSIONS WHICHARE REMOVABLY AND TELESCOPICALLY RECEIVED WITHIN THE DISTAL END REGIONSOF THE SIDE LEGS OF THE OTHER FRAME SECTIONS WHEREBY THE UPPER FRAMESECTION IS SUPPORTED FROM AND OVERLIES THE LOWER FRAME SECTION, THEEFFECTIVE LENGTH OF ALL OF THE SIDES LEGS OF THE LOWER FRAME SECTIONBEING EQUAL AND THE LENGTH OF THE SIDES LEGS OF ONE FRAME MEMBER OF THEUPPER FRAME SECTION BEING GREATER THAN THE LENGTH OF THE SIDE LEGS OFTHE OTHER FRAME MEMBER OF SAID LATTER FRAME SECTION WHEREBY THE BIGHTPORTIONS OF THE UPPER FRAME SECTION ASSUME DIFFERENT HEIGHTS, AND ALECTERN PLATFORM REMOVABLY SECURED TO SAID BIGHT PORTIONS OF THE TWOFRAME MEMBERS, BRIDGING THE DISTANCE THEREBETWEEN, AND OVERHANGING ATLEAST ONE OF SAID BIGHT PORTIONS.